2.7.4 Cooling mechanism
The cleaning unit is located near the fusing unit, and it
can easily become hot from the heat of the fusing unit
and by the cleaning unit’s own friction heat.
The following cooling mechanisms are provided to
prevent blocking of the toner caused by heat.
Doctor blade cooling
Air is sent to the doctor blade by the cleaning inside
cooling fan from the front side of the unit and discharged
to the upper outlet.
Cooling inside unit
The air pressure caused by stirring the cleaning carrier
is sent to the upper part of the unit. An air hole is
provided on the bronze seal of the scavenging blade to
send air to the upper part of the unit. These air flows
cool the unit inside.
Cooling outside unit
The cleaning unit cooling fan draws air from the left side
of the main body to cool the outside of the unit.
Air blow from inner cover
Air is also sent from the inner cover of the OPC unit.
Used toner collecting tube cooling
The cleaning coil cooling fan cools the used toner
collecting tube to prevent toner blocking there.
Doctor blade
Cleaning inside cooling
fan
Cleaning unit cooling fan
Doctor blade
Air pressure
shield mylar
Air guide mylar
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